1*1da177e4SLinus Torvalds /* 2*1da177e4SLinus Torvalds * Copyright � 2001 Flaga hf. Medical Devices, K�ri Dav��sson <kd@flaga.is> 3*1da177e4SLinus Torvalds * 4*1da177e4SLinus Torvalds * $Id: cfi_flagadm.c,v 1.14 2004/11/04 13:24:14 gleixner Exp $ 5*1da177e4SLinus Torvalds * 6*1da177e4SLinus Torvalds * This program is free software; you can redistribute it and/or modify it 7*1da177e4SLinus Torvalds * under the terms of the GNU General Public License as published by the 8*1da177e4SLinus Torvalds * Free Software Foundation; either version 2 of the License, or (at your 9*1da177e4SLinus Torvalds * option) any later version. 10*1da177e4SLinus Torvalds * 11*1da177e4SLinus Torvalds * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 12*1da177e4SLinus Torvalds * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 13*1da177e4SLinus Torvalds * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN 14*1da177e4SLinus Torvalds * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 15*1da177e4SLinus Torvalds * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 16*1da177e4SLinus Torvalds * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 17*1da177e4SLinus Torvalds * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON 18*1da177e4SLinus Torvalds * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 19*1da177e4SLinus Torvalds * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 20*1da177e4SLinus Torvalds * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 21*1da177e4SLinus Torvalds * 22*1da177e4SLinus Torvalds * You should have received a copy of the GNU General Public License along 23*1da177e4SLinus Torvalds * with this program; if not, write to the Free Software Foundation, Inc., 24*1da177e4SLinus Torvalds * 675 Mass Ave, Cambridge, MA 02139, USA. 25*1da177e4SLinus Torvalds */ 26*1da177e4SLinus Torvalds 27*1da177e4SLinus Torvalds #include <linux/module.h> 28*1da177e4SLinus Torvalds #include <linux/types.h> 29*1da177e4SLinus Torvalds #include <linux/kernel.h> 30*1da177e4SLinus Torvalds #include <linux/init.h> 31*1da177e4SLinus Torvalds #include <asm/io.h> 32*1da177e4SLinus Torvalds #include <linux/mtd/mtd.h> 33*1da177e4SLinus Torvalds #include <linux/mtd/map.h> 34*1da177e4SLinus Torvalds #include <linux/mtd/partitions.h> 35*1da177e4SLinus Torvalds 36*1da177e4SLinus Torvalds 37*1da177e4SLinus Torvalds /* We split the flash chip up into four parts. 38*1da177e4SLinus Torvalds * 1: bootloader firts 128k (0x00000000 - 0x0001FFFF) size 0x020000 39*1da177e4SLinus Torvalds * 2: kernel 640k (0x00020000 - 0x000BFFFF) size 0x0A0000 40*1da177e4SLinus Torvalds * 3: compressed 1536k root ramdisk (0x000C0000 - 0x0023FFFF) size 0x180000 41*1da177e4SLinus Torvalds * 4: writeable diskpartition (jffs)(0x00240000 - 0x003FFFFF) size 0x1C0000 42*1da177e4SLinus Torvalds */ 43*1da177e4SLinus Torvalds 44*1da177e4SLinus Torvalds #define FLASH_PHYS_ADDR 0x40000000 45*1da177e4SLinus Torvalds #define FLASH_SIZE 0x400000 46*1da177e4SLinus Torvalds 47*1da177e4SLinus Torvalds #define FLASH_PARTITION0_ADDR 0x00000000 48*1da177e4SLinus Torvalds #define FLASH_PARTITION0_SIZE 0x00020000 49*1da177e4SLinus Torvalds 50*1da177e4SLinus Torvalds #define FLASH_PARTITION1_ADDR 0x00020000 51*1da177e4SLinus Torvalds #define FLASH_PARTITION1_SIZE 0x000A0000 52*1da177e4SLinus Torvalds 53*1da177e4SLinus Torvalds #define FLASH_PARTITION2_ADDR 0x000C0000 54*1da177e4SLinus Torvalds #define FLASH_PARTITION2_SIZE 0x00180000 55*1da177e4SLinus Torvalds 56*1da177e4SLinus Torvalds #define FLASH_PARTITION3_ADDR 0x00240000 57*1da177e4SLinus Torvalds #define FLASH_PARTITION3_SIZE 0x001C0000 58*1da177e4SLinus Torvalds 59*1da177e4SLinus Torvalds 60*1da177e4SLinus Torvalds struct map_info flagadm_map = { 61*1da177e4SLinus Torvalds .name = "FlagaDM flash device", 62*1da177e4SLinus Torvalds .size = FLASH_SIZE, 63*1da177e4SLinus Torvalds .bankwidth = 2, 64*1da177e4SLinus Torvalds }; 65*1da177e4SLinus Torvalds 66*1da177e4SLinus Torvalds struct mtd_partition flagadm_parts[] = { 67*1da177e4SLinus Torvalds { 68*1da177e4SLinus Torvalds .name = "Bootloader", 69*1da177e4SLinus Torvalds .offset = FLASH_PARTITION0_ADDR, 70*1da177e4SLinus Torvalds .size = FLASH_PARTITION0_SIZE 71*1da177e4SLinus Torvalds }, 72*1da177e4SLinus Torvalds { 73*1da177e4SLinus Torvalds .name = "Kernel image", 74*1da177e4SLinus Torvalds .offset = FLASH_PARTITION1_ADDR, 75*1da177e4SLinus Torvalds .size = FLASH_PARTITION1_SIZE 76*1da177e4SLinus Torvalds }, 77*1da177e4SLinus Torvalds { 78*1da177e4SLinus Torvalds .name = "Initial ramdisk image", 79*1da177e4SLinus Torvalds .offset = FLASH_PARTITION2_ADDR, 80*1da177e4SLinus Torvalds .size = FLASH_PARTITION2_SIZE 81*1da177e4SLinus Torvalds }, 82*1da177e4SLinus Torvalds { 83*1da177e4SLinus Torvalds .name = "Persistant storage", 84*1da177e4SLinus Torvalds .offset = FLASH_PARTITION3_ADDR, 85*1da177e4SLinus Torvalds .size = FLASH_PARTITION3_SIZE 86*1da177e4SLinus Torvalds } 87*1da177e4SLinus Torvalds }; 88*1da177e4SLinus Torvalds 89*1da177e4SLinus Torvalds #define PARTITION_COUNT (sizeof(flagadm_parts)/sizeof(struct mtd_partition)) 90*1da177e4SLinus Torvalds 91*1da177e4SLinus Torvalds static struct mtd_info *mymtd; 92*1da177e4SLinus Torvalds 93*1da177e4SLinus Torvalds int __init init_flagadm(void) 94*1da177e4SLinus Torvalds { 95*1da177e4SLinus Torvalds printk(KERN_NOTICE "FlagaDM flash device: %x at %x\n", 96*1da177e4SLinus Torvalds FLASH_SIZE, FLASH_PHYS_ADDR); 97*1da177e4SLinus Torvalds 98*1da177e4SLinus Torvalds flagadm_map.phys = FLASH_PHYS_ADDR; 99*1da177e4SLinus Torvalds flagadm_map.virt = ioremap(FLASH_PHYS_ADDR, 100*1da177e4SLinus Torvalds FLASH_SIZE); 101*1da177e4SLinus Torvalds 102*1da177e4SLinus Torvalds if (!flagadm_map.virt) { 103*1da177e4SLinus Torvalds printk("Failed to ioremap\n"); 104*1da177e4SLinus Torvalds return -EIO; 105*1da177e4SLinus Torvalds } 106*1da177e4SLinus Torvalds 107*1da177e4SLinus Torvalds simple_map_init(&flagadm_map); 108*1da177e4SLinus Torvalds 109*1da177e4SLinus Torvalds mymtd = do_map_probe("cfi_probe", &flagadm_map); 110*1da177e4SLinus Torvalds if (mymtd) { 111*1da177e4SLinus Torvalds mymtd->owner = THIS_MODULE; 112*1da177e4SLinus Torvalds add_mtd_partitions(mymtd, flagadm_parts, PARTITION_COUNT); 113*1da177e4SLinus Torvalds printk(KERN_NOTICE "FlagaDM flash device initialized\n"); 114*1da177e4SLinus Torvalds return 0; 115*1da177e4SLinus Torvalds } 116*1da177e4SLinus Torvalds 117*1da177e4SLinus Torvalds iounmap((void *)flagadm_map.virt); 118*1da177e4SLinus Torvalds return -ENXIO; 119*1da177e4SLinus Torvalds } 120*1da177e4SLinus Torvalds 121*1da177e4SLinus Torvalds static void __exit cleanup_flagadm(void) 122*1da177e4SLinus Torvalds { 123*1da177e4SLinus Torvalds if (mymtd) { 124*1da177e4SLinus Torvalds del_mtd_partitions(mymtd); 125*1da177e4SLinus Torvalds map_destroy(mymtd); 126*1da177e4SLinus Torvalds } 127*1da177e4SLinus Torvalds if (flagadm_map.virt) { 128*1da177e4SLinus Torvalds iounmap((void *)flagadm_map.virt); 129*1da177e4SLinus Torvalds flagadm_map.virt = 0; 130*1da177e4SLinus Torvalds } 131*1da177e4SLinus Torvalds } 132*1da177e4SLinus Torvalds 133*1da177e4SLinus Torvalds module_init(init_flagadm); 134*1da177e4SLinus Torvalds module_exit(cleanup_flagadm); 135*1da177e4SLinus Torvalds 136*1da177e4SLinus Torvalds 137*1da177e4SLinus Torvalds MODULE_LICENSE("GPL"); 138*1da177e4SLinus Torvalds MODULE_AUTHOR("K�ri Dav��sson <kd@flaga.is>"); 139*1da177e4SLinus Torvalds MODULE_DESCRIPTION("MTD map driver for Flaga digital module"); 140